Nutrient Bubble Concept

Click here to see presentation on Nutrient Bubble Concept.

This concept and presentation were developed by Spokane County, City of Spokane, Liberty Lake Water and Sewer District, City of Coeur d’Alene, City of Post Falls, Hayden Area Regional Sewer Board, Avista, Inland Empire Paper Company and Kaiser Aluminum.

This concept provides a means for point source dischargers to meet permit limits by providing “mutual aide,” e.g.– utilizing unused permit discharge allowance from one point source to meet overage at another point source. This concept is based on the principle of participating dischargers meeting their combined riverine assessment point requirements.